Table 2.
Comparison of patients recruited to the study with patients who declined to participate, by age group, sex and urbanization degree, Poland, July 2009–April 2011
| Patients meeting inclusion criteria | Declined to participate | Recruited and tested | ||||
|---|---|---|---|---|---|---|
| N | % | N | % | N | % | |
| Age group (years) | ||||||
| 3–19 | 576 | 31·1 | 247 | 39·8 | 329 | 26·7 |
| 20–39 | 432 | 23·3 | 102 | 16·5 | 330 | 26·8 |
| 40–59 | 517 | 27·9 | 179 | 28·9 | 338 | 27·4 |
| ⩾60 | 327 | 17·7 | 92 | 14·8 | 235 | 19·1 |
| Sex | ||||||
| Male | 734 | 18·2 | 273 | 44·0 | 461 | 37·4 |
| Female | 1118 | 27·7 | 347 | 56·0 | 771 | 62·6 |
| Urbanization (township size) | ||||||
| <20 000 | 817 | 44·1 | 219 | 35·3 | 598 | 48·5 |
| 20 000–100 000 | 278 | 15·0 | 181 | 29·2 | 97 | 7·9 |
| >100 000 | 757 | 40·9 | 220 | 35·5 | 537 | 43·6 |
| Total | 1852 | 100·0 | 620 | 100·0 | 1232 | 100·0 |